METHODOLOGICAL APPROACHES TO AUTOMATION OF ELECTROMAGNETIC SCREENS

Abstract

The possibilities of automation of processes of designing materials and structures for shielding electrical, magnetic and electromagnetic fields of a wide frequency range are investigated. It is shown that the need for automation of design processes is due to the dependence of protective properties (coefficients of shielding) materials from several parameters – magnetic and dielectric permeates, electrical conductivity of the thickness of the material. For composite materials it is necessary to take into account the volumetric content and dispersion of the screening filler in the dielectric matrix. The initial data are the necessary shielding coefficients (taking into account the reflection coefficients of electromagnetic waves in the range of ultrahigh frequencies). Based on the fundamental ratio of electrodynamics of continuous media, the ratio for successive determination of refractive indexes and extinction of materials, which provides the ability to calculate the values of the actual and imaginary components of complex dielectric permeability. On the basis of these values, the specific electrical conductivity of materials is determined. This, in turn, allows you to determine the equivalent depth of penetration of a high-frequency electromagnetic field into the material. It is shown that for calculating relative magnetic and dielectric permeations with acceptable errors, it is advisable to use the ratio of Lorentz and Maxwell-Garnet. To do this, it is enough to have information about the dielectric and magnetic permeability of the components (which are reference values) and the bulk content of the screening substance in the dielectric matrix. This allows you to uniquely identify the protective properties of the composition in a wide frequency range. Taking into account the dependence of the effectiveness of materials from many factors, automation of design processes will optimize the ratio of critical parameters taking into account the magnetic properties and cost of the final product.